<!DOCTYPE html>
<head>
  <title>Test ID Selector Engine Test Suite</title>
</head>
<body>
  <button data-testid="submit-button">Submit</button>
  <input type="text" data-testid="username-input" placeholder="Username">
  <div data-testid="info-box">Information</div>
  <span data-testid="abc123">Test span</span>
  <a href="#" data-testid="my-link">Link</a>
</body>
</html> 